Ive got a 90 Mustang GT and I'm going to be adding 24 lbs fuel injectors, a 76mm maf, and a 155 lpm fuel pump. I currently have a 70mm throttle body, cobra intake, edelbrock heads 60cc and stock cam. My question is do I really need an adjustable fuel pressure regualtor or will a stock one be fine? The pressure should be kept at about 39psi anyway right? I would hate to spend $100 on a adjustable on I don't really need. Once I get my car tuned I wouldn't be messing with the fuel pressure. So would I be fine with a stock one? Thanks.